If he had listened to engineers he would have done what they do at SpaceX and Scaled Composites:Exactly. If he listened to all the engineers he would not even consider an auto diesel or canard or anything as a first try. But his engineer stuck with it.
And it has worked for several months so far.
* Instituted rigorous weight controls so that he has reasonably accurate estimates for the weight of every component and can make responsible decisions about what features to include and what to leave out. He would have been using the materials mass estimation features in his CAD software from day 1, and weighing each off-the-shelf component as it arrived, and using reasonable mass estimates for other things. That would have saved him the huge disappointment of finding out how heavy the thing is so late in the program when there is little to be done about it.
* Considered the elastic properties of all assemblies, and especially for the control system. That plus some judicious breadboarding would have saved him several frustrating iterations of primary control system design. At the heart of this particular tidbit is the misguided use of extremely short cable travels, and consequently high cable tensions, which made stiffness extra important--stiffness that was notably lacking in his TLAR'd system anchors.
* Started simple, within the cloud of established practice, and innovated from there. Imagine if Peter had just bought a Velocity kit and an IO-540, reverse-engineered a slightly wider fuselage from carbon, and added pressurization once he had it flying. If he followed those other two bits of engineering advice, he probably would have pulled it off and had the 25,000-foot cruising altitude so critical to his performance claims. He could then build upon that foundation of success with some judicious powerplant innovation.
If he had followed the engineering guide for the torsional damper, he would have used a much larger unit with beefier attachment. The one he chose is being used well above its torque and RPM specs.Yes, you are correct. I didnt remember that. That sort of proves my point. I don't trust the engineering team effort on this.
There is no "the engineer." There is only Peter, and he regards and disregards engineering advice from a variety of sources at his convenience.Why doesn't the engineer just tell him to suspend any test flights and move to an airplane engine instead of helping redesign the PSRU each time?